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Finding the Fourth Proportional to 711,871.09, 982,368.97 and 389,574.72

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Solution

The fourth proportional to 711,871.09, 982,368.97 and 389,574.72 is: 537,605.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,871.09 : 982,368.97 = 389,574.72 : x
  2. Step 2: Convert to fraction form
    711,871.09/982,368.97 = 389,574.72/x
  3. Step 3: Cross multiply
    711,871.09x = 982,368.97 × 389,574.72
  4. Step 4: Simplify right side
    711,871.09x = 382,706,115,450.50
  5. Step 5: Solve for x
    x = 382,706,115,450.50/711,871.09
  6. Step 6: Final answer
    x = 537,605.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.